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Jay McInerney's latest book, How It Ended, was feted at the 21 Club on Wednesday night. On hand for the occasion: McInerney's wife, Anne Hearst, Brooke Shields, Candace Bushnell and Charles Askegaard, Gay and Nan Talese, Morgan Entrekin, Nina Garcia, Pamela Fiori, Bob Colacello, Richard Johnson and Sessa Von Richthofen, Peggy Siegal, Muffie Potter Aston, Bettina Zilkha, Cornelia Guest, Debbie Bancroft, Valesca Guerrand-Hermes, Nina Griscom, Somers White Farkas, Patrick McMullan, Robert Couturier, George Farias, Tatiana and Campion Platt, Kimberly Rockefeller, Pamela Gross, Harry Slatkin, Dana Hammond, Harry Benson, and Deborah Norville. [PMc, VF, P6]

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• The Cinema Society hosted a screening of The Brothers Bloom at the Tribeca Grand Hotel last night. In attendance at the screening and after-party: The film's stars, Adrien Brody and Rachel Weisz; Weisz's husband, director Darren Aronofsky; the event's sponsors, Thakoon Panichgul and Francois Nars; and a crowd that included Russell Simmons, Rachel Roy, Narciso Rodriguez, Liliana and Timothy Greenfield-Sanders, Jennifer Esposito, Olivia Palermo and Johannes Huebl, Byrdie Bell, Genevieve Jones, Jack Bryan, Dayssi Olarte de Kanavos, Patrick McMullan, Paula Froelich, Dree Hemingway, Eugenia Silva, Irina Pantaeva, Jackie Astier, and Lyle Maltz. [PMc, Wireimage, GoaG]

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• DKMS hosted its third annual gala at Cipriani 42nd Street last night. Rihanna, Betsey Johnson, Chelsea Clinton, Vera Wang, Rachel Zoe, Cindy Crawford, Eva Mendes, Francisco Costa, Derek Lam, Mario Cantone, Kylie Minogue, Natasha Bedingfield, Carol Alt, Morgan Fairchild, Run-DMC's Reverend Run and Darryl McDaniels, and Maria Menounos all turned out for the cause. [PMc, Wireimage, Us]

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• Derek Lam threw a cocktail party to celebrate the opening of his new Soho store on Wednesday. He was joined by Rihanna, Anna Wintour, Kate Hudson, Robbie Myers, Anne Slowey, Glenda Bailey, Stefano Tonchi, Amy Astley, Alexis Bryan Morgan, Anne Christensen, Mary Alice Stephenson, Fern Mallis, Roopal Patel, Julie Gilhart, LA Reid, Genevieve Jones, Meredith Melling Burke, Phillip Lim, Nate Berkus, Diego Della Valle, Brian Atwood, Magnus Berger, and models like Lakshmi Menon and Maryna Linchuk. [PMc, WWD, FWD]